busybox/libbb/wfopen_input.c

/* vi: set sw=4 ts=4: */
/*
 * wfopen_input implementation for busybox
 *
 * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

/* A number of applets need to open a file for reading, where the filename
 * is a command line arg.  Since often that arg is '-' (meaning stdin),
 * we avoid testing everywhere by consolidating things in this routine.
 */

#include "libbb.h"

FILE* FAST_FUNC fopen_or_warn_stdin(const char *filename)
{
	FILE *fp = stdin;

	if (filename != bb_msg_standard_input
	 && NOT_LONE_DASH(filename)
	) {
		fp = fopen_or_warn(filename, "r");
	}
	return fp;
}

FILE* FAST_FUNC xfopen_stdin(const char *filename)
{
	FILE *fp = fopen_or_warn_stdin(filename);
	if (fp)
		return fp;
	xfunc_die();	/* We already output an error message. */
}

int FAST_FUNC open_or_warn_stdin(const char *filename)
{
	int fd = STDIN_FILENO;

	if (filename != bb_msg_standard_input
	 && NOT_LONE_DASH(filename)
	) {
		fd = open_or_warn(filename, O_RDONLY);
	}

	return fd;
}
1	niro	532	/* vi: set sw=4 ts=4: */
2			/*
3			* wfopen_input implementation for busybox
4			*
5			* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
6			*
7			* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
8			*/
9
10			/* A number of applets need to open a file for reading, where the filename
11			* is a command line arg. Since often that arg is '-' (meaning stdin),
12			* we avoid testing everywhere by consolidating things in this routine.
13			*/
14
15			#include "libbb.h"
16
17	niro	816	FILE* FAST_FUNC fopen_or_warn_stdin(const char *filename)
18	niro	532	{
19			FILE *fp = stdin;
20
21			if (filename != bb_msg_standard_input
22			&& NOT_LONE_DASH(filename)
23			) {
24			fp = fopen_or_warn(filename, "r");
25			}
26			return fp;
27			}
28	niro	816
29			FILE* FAST_FUNC xfopen_stdin(const char *filename)
30			{
31			FILE *fp = fopen_or_warn_stdin(filename);
32			if (fp)
33			return fp;
34			xfunc_die(); /* We already output an error message. */
35			}
36
37			int FAST_FUNC open_or_warn_stdin(const char *filename)
38			{
39			int fd = STDIN_FILENO;
40
41			if (filename != bb_msg_standard_input
42			&& NOT_LONE_DASH(filename)
43			) {
44			fd = open_or_warn(filename, O_RDONLY);
45			}
46
47			return fd;
48			}